STRATFORD — Sikorsky Aircraft Corp. has brought a new heat and power facility online to supply 84 percent of its two-million-square-foot facility.

The power plant is expected to provide 85 percent of the facility’s steam heating needs while reducing greenhouse emissions by more than 8,900 metric tons (equal to 1,600 automobiles) annually. The plant’s energy output equates to the annual energy use of about 1,100 area homes.

The power facility took three and a half years to build and cost more than $30 million, financed by capital investment by the company and from a state cogeneration incentive grant in the amount of $4.66 million.

The company last year installed 450 solar panels on the roof of its engineering building as part of another effort for cost savings and generation of clean energy.

The new facility was dedicated to the late Walter Joseph, who worked for Sikorsky for 32 years and helped in the planning and construction of the facility.

 TRUMBULL — German automotive engine component manufacturer Mahle will close its facility in Trumbull and lay off 99 workers starting December 31.

The Stuttgart-based company said the Connecticut facility is its only North American location that produces small engine cylinders, and the company is focusing more on large engines and automotive components.

Some of the work done at the Trumbull facility will be transferred to European factories, and customers will take on some assembly work in-house.

Mahle’s presence in Connecticut began in Fairfield in 1975, before moving to Bridgeport in 1981, and then Trumbull in 1995. The company’s six-month sales figures from June were roughly $4 billion.